
        * {
            margin: 0;
            padding: 0;
        }

        body {
            background-color: rgb(233, 233, 233);

        }

        h4 {
            font-size: 14px;
            height: 20px;
            margin-top: 20px;
            margin-left: 270px;
        }

        #diYi1 {
            background-color: white;
            width: 1000px;
            height: 600px;
            /* border: 1px solid black; */
            border-radius: 0 8px 8px 8px;
            margin: 0 auto;
            /* margin-top: 15px; */
        }

        #diYi2 {
            background-color: white;
            width: 1000px;
            height: 600px;
            border-radius: 0 8px 8px 8px;
            margin: 0 auto;
            display: none;
        }

        #xzt {
            margin-left: 267px;
            margin-top: 15px;
        }

        #zyfs {
            width: 180px;
            margin-left: 40px;
            margin-top: 40px;
        }

        #bg3 {
            width: 960px;
            /* border: 1px solid black; */
            margin: 0 auto;
            top: 40px;
            position: relative;

        }

        #nav2 {
            margin-top: -75px;
            margin-left: 700px;
        }

        #nav3 {
            margin-top: -75px;
            margin-left: 700px;
            display: none;
        }

        #bj2 {
            font-size: 12px;

        }
